When you say 'bad-boy' I think of quite a few mainstream K-pop boy bands. Specifically, I find T.O.P quite bad ass (and hot as hell <3 ) and if you've heard of B.A.P their début song is really powerful especially with Zelo and Bang's (Bang Yong Guk) rapping

When you say 'bad-boy' I think of quite a few mainstream K-pop boy bands. Specifically, I find T.O.P quite bad ass (and hot as hell <3 ) and if you've heard of B.A.P their début song is really powerful especially with Zelo and Bang's (Bang Yong Guk) rapping

For Boyband probably MBLAQ.
Well video wise 'bad boy' anyways, they're hilariously funny in real life.
Especially Lee Joon (the one with the abs who is always picked on)
http://www.youtube.com/watch?v=m7LVU4NqD-E